So I like to spend a few days at a time in a park with few services. Until now I have always stayed in a hotel nearby. But they would let me camp there. I am too old for tents and too cheap to buy an RV, so I am wondering about having a full-sized SUV be my "tent." I have already got some helpful advice on a mattress. Any words of wisdom on doing this, ventilation, fans, inverters, whatever?